If you have high blood pressure, cutting back on booze could produce a small but significant drop of 2 to 4 mm Hg systolic (the top number) and 1 to 2 mm Hg diastolic (the bottom number).

如果你有高血压，那么当你减少饮酒量时，可以使心脏收缩压有很小但又有意义的下降，可以下降2 - 4毫米汞柱(上面的数即分子数值)，以及心脏舒张压下降1 - 2毫米汞柱(下面的数即分母数值)。

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So the research on the water bursting mechanism and forecasting technique become the key technique of coal mining on top of the high pressure aquifer .

鉴于突水直接影响到煤矿的生产安全对底板突水机理的研究及突水预测预报技术研究成为承压水上采煤的关键技术。

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Introduce the working principle, hardware composition and PLC software design of an iron top-layer removing system with high pressure water based on programmable logic controller.

介绍了以可编程控制器为核心的高压水除鳞控制系统的工作原理，硬件构成及PLC软件设计。

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